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(No Model.) 2 Sheets-Sheet l S. M. HOTGHKISS & B. A. MASON.

PRESS FOR DRYING BARREL HEADS 0F PULP, 850.

No. 318,741. Patented May 26, 1885.

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(No Model.) 2 Sheets-Sheet 2. S. M. HOTOHKISS & B. A. MASON.

PRESS FOR DRYING BARREL HEADS 0F PULP, &0.

No. 318,741. Patented May 26, 1885.

N. PETERS PhmwLiihognphur. Washington D. C.

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SAMUEL M. HOTGHKISS AND BENJAMIN A. MASON, OF HARTFORD, CONN.

PRESS FOR DRYENG BARREL-HEADS OF PULP, 80C.

SPECIFICATIUN forming part of Letters Patent No. 318,7421, dated Ivlay26,1885.

Application filed January 24, 1885. (No model.)

.To all whom it may concern:

Be it known that we, SAMUEL M. Horon- KIss and BENJAMIN A. Mason, bothof Hartford, in the county of Hartford and State of Connecticut, haveinvented a certain new and useful Improvement Pertaining to Presses forDrying Barrel-Heads of Pulp, and the like, of which the following is adescription, reference being had to the accompanying drawings, whereFigure l is an elevation view of the machine made use of as it appearswhen supplied with barrel-heads ready to be pressed-a front view. Fig. 2is a sectional elevation of the machine siown in Fig. 1. The piston hasrisen from the position shown in Fig. 1 and put the barrel-heads underpressure. Fig. 3 is an elevation view of the machine shown in Fig. lfromthe side A, with the heads under pressure, as in Fig. 2. Fig. 4 is aplan view of the machine shown in Fig. 1. Fig. 5 is a top or plan Viewof one of the drying-cases for containing a barrel-head while it isdried by heat under pressure, as herein describedscaleenlarged. Fig. 6is a view of the drying-case shown in Fig. '5 in central verticalsection. Fig. 7 is a view of the drying-case shown in Fig. 5 inhorizontal section on the plane a: m. Fig. Sis a view of the drying-caseshown in Fig. 5 in horizontal section on the plane y 3 This machine isdesigned for drying barrelheads by artificial heat applied to both sidesof the head (periphery also) while the head is under pressure, the headhaving been pre Viously formed in another machine.

The frame of this machine is composed of the bottom casting, a, the topcasting, b, and the strong connecting-pillars c.

The barrel-head is brought to this machine in the rim-former t, andremains in it while the heat and pressure are applied. A number of thedrying-cases are arranged one above another, as shown in Fig. 1, withspaces between them, which permit the insertion of barrel heads withintheir rim formers, as shown in Fig. 1.

Theletter d denotes the fixed platen, against which the drying-cases arepressed; and e denotes the piston which does the pressing. It enters thehydraulic cylinder f, is forced upward at the proper time by watercoming from a hydraulic pump, and entering the cylinder through the duct9. The weight of the piston is sufiicient to cause the piston to falland retract as water is withdrawn from the cylinder f. Each drying-caseis, in substance, a case recessed and rightly shaped to receive abarrel-head (in its rim-former.) It is made hollow or provided withheat-ducts for the circulation of steam or other heating agent, for thepurpose of applying heat while the head is under pressure to both sidesand the periphery of the head, and provided with means for the outlet ofthe vapor which escapes from the head as it dries. The rinrformer tissurfaced on the inside with a finely-perforated mold face, back of whichit is perforated through and through vertically with larger holeslettinginto numerous vertical grooves, h, on the back-an arrangementwhich permits the escape of vapor from the barrel-head, so far as therim-former is concerned.

The body or principal part of the dryingcase is denoted by the letter 1It is furnished with bifurcations j, which act as guides in cooperationwith the pillars c. The drying cases are chambered by heat-ducts k, forthe circulation of steam,which enters by orifice Z, which is connectedto the generator by a flexible jointed or telescopic tube.

The letter M denotes a dish-shaped piece, fitting into and attached tothe piece i, the heat-ducts of which, k, are readily seen in Fig. 7.

Within and attached to the piece on is an other piece, a, in the natureof a former-plate for the outside of the barrel-head. On the under sideit is surfaced with a finely-perforated niold-face, back of which it isperforated vertically through and through the perforations leading tothe grooves 0an arrangement which permits the escape of vapor from thedrying'head so far as the upper and outside surface of the barrel-headis concerned. The under side of the barrel-head rests on the plate 1),which is surfaced with a fine1y-perforated mold-face, back of which itis perforated vertically through and through, the perforations leadingto the grooves ran arrangement which permits the escape of vapor fromthe under surface of the barrethead in drying. This plate is fast to theupper side of the body-piece 'i of the drying-case next in order below.

The letters 8 denote catch-fingers, which re- 2. In combination, thepressing-piston, the spectively catch and hold the respective dryfixedplaten, and the drying-cases chambered I ing-cases as the piston dropsback, the dryby heat-ducts, substantially as described, and

Y ing-cases being provided with co-operating for the purpose set forth.5 lugs for that purpose. 3. In combination, the pressing-piston, the

The rim-former t is made in two sections fixed platen, the drying-cases,and the catchhinged together, so that it may be opened to fingers,substantially as described, and for the 20 free the barrel-head. purposeset forth. T

The improvement claimed herein is- SAMUEL M. HOTGHKISS. IO 1. Incombination, the pressing-piston, the BENJAMIN A. MASON.

fixed platen, the drying-cases, and the rim- Witnesses: formers,substantially as described, and for CHAS. L. BURDETT, the purpose setforth. H. R. WILLIAMS.

